Determining of telegram lengths

a technology of measuring device and telegram, applied in the field of measuring technology, can solve the problems of requiring considerable maintenance expenditure, affecting the operation of the plurality of measuring devices, and causing the danger of providing faulty or inconsistent user interfaces in the different operating tools

Inactive Publication Date: 2010-11-09
VEGA GRIESHABER GMBH & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach ensures reliable and efficient communication by dynamically adjusting telegram length to match the capabilities of the field device system, preventing errors and improving overall system performance.

Problems solved by technology

However, operating this plurality of measuring devices can turn out to be difficult, because operation with the operating devices provided by the measuring device can often take place substantially only locally at the measuring device.
Such a different description may not be only associated with enormous expenditure of time and costs, but it may also be associated with the danger of providing faulty or inconsistent user interfaces in the different operating tools.
Furthermore, very considerable maintenance expenditure may be required if, for example, expansions of functions or extensions of parameters may be carried out in a field device or device, because these changes may also need to be incorporated in every user interface.
However, only the shared or commonly available functionality can be utilised in automatic conversion.
It can thus, for example happen that DTMs that have been generated by means of conversion tools cannot exploit the technical possibilities provided by FDT technology because the functions or parameters may not be present in EDD technology.
However, many device manufacturers may not state the maximum telegram lengths that can be processed in their components.
If operation may be at a telegram length that may be shorter than the maximum possible telegram length, operation in the system may possibly be at too low speed of transmission.

Method used

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  • Determining of telegram lengths
  • Determining of telegram lengths
  • Determining of telegram lengths

Examples

Experimental program
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Embodiment Construction

[0130]FIG. 1 shows an operating apparatus 10 or an operating tool 10 that comprises a DTM module for a field device 100 or a field device DTM 100. A field device DTM 100 is, in particular, a sensor DTM 100 or an actuator DTM 100. Furthermore, the operating tool 10 comprises a DTM for a remote I / O 101.

[0131]The field device DTM 100 represents an interface for a field device tool (FDT), which field device tool is not shown in FIG. 1 but which may be connected to the interface 102. The field device DTM 100 administers field-device-specific commands and can evaluate field-device-specific responses. The field device DTM 100 quasi represents the driver for a remote field device, in particular for a remote sensor or actuator. This field device DTM 100 runs in the operating tool 10.

[0132]The operating tool 10 may be a PC 10 that provides a frame or a frame application into which the field device DTM 100 integrates. The field device DTM 100 is furthermore connected to the DTM 101 of the remo...

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Abstract

Described is a method for determining a telegram length in an operating apparatus for communicating between the operating apparatus and a field device via a network. The method comprises composing a first telegram in the operating apparatus. The first telegram comprises a predeterminable first telegram length, and the composed first telegram is despatched via the network to the field device. After the first telegram has been despatched, the operating apparatus waits for the receipt of a second telegram, which second telegram is received by the operating apparatus via the network. After successful receipt of the second telegram, the first telegram length is increased by a predeterminable value. Increasing the value takes place until receiving the second telegram fails. After the receipt of the second telegram has failed, the first telegram length that has resulted in successfully receiving the second telegram is provided.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of the filing date of U.S. Provisional Patent Application Ser. No. 61 / 058,711 filed Jun. 4, 2008 and EP Patent Application No. EP 08 157 593.8 filed Jun. 4, 2008, the disclosures of which are hereby incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to the field of measuring technology. In particular, the present invention relates to a method for determining a telegram length; to a program element for determining a telegram length; to a method for responding to the receipt of a telegram; to a program element for responding to the receipt of a telegram; to an operating apparatus; to a field device; and to a system for determining a telegram length.BACKGROUND INFORMATION[0003]Measuring devices, in particular a field device, for example a sensor or an actuator, as a rule may have their own operating devices or operating apparatuses for operating. These operating devices ma...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): H04L12/26
CPCG05B19/4185H04L12/66G05B2219/31113G05B2219/31132G05B2219/32144H04L2012/4026Y02P90/02
InventorISENMANN, ANDREASFAIST, FRIDOLIN
OwnerVEGA GRIESHABER GMBH & CO